Star Wars: Tales of the Jedi the Sith War, Multiple Firsts, 1 - 6 , VF/NM

Exar Kun as a Sith Lord: While Exar Kun was introduced in earlier Tales of the Jedi arcs, The Sith War marks his full emergence as a Sith Lord after his fall to the dark side. His transformation and leadership in the Great Sith War are central to the story, and this series showcases his use of the iconic double-bladed lightsaber for the first time in Star Wars media, predating Darth Maul's appearance in The Phantom Menace 

Ulic Qel-Droma's Role as a Sith: Similar to Exar Kun, Ulic Qel-Droma's journey to the dark side is completed in this series. While he appeared in earlier arcs, The Sith War is significant for depicting his full commitment to the Sith cause alongside Exar Kun, as well as pivotal moments in his arc during the conflict 

Introduction of Key Sith Artifacts and Lore: The series expands on the mythology of the Sith through the introduction and exploration of ancient Sith artifacts, magic, and teachings that corrupt Exar Kun and Ulic Qel-Droma. While not a "character," these elements are critical firsts in establishing the deep history of Sith power in the Star Wars universe during this era, around 3996 BBY